نتایج جستجو برای: single extraction
تعداد نتایج: 1024580 فیلتر نتایج به سال:
fifty street dust samples were collected from southern and eastern parts of tehran, the capitalof iran. samples were collected during summer under dry and stable weather conditions. total concentrationsof copper (cu), cadmium (cd), lead (pb), chromium (cr), nickel (ni), zinc (zn), iron (fe), manganese (mn)and lithium (li) were determined. ten samples were then selected for characterization, met...
in this work, a novel and fast method for direct analysis of volatile compounds (davc) of medicinal plants has been developed by holding a filament from different parts of a plant in the gc injection port. the extraction and analysis of volatile components of a small amount of plant were carried out in one-step without any sample preparation. after optimization of temperature, extraction time a...
background: nematodes are among the most common and important parasites of man and animal. dna of a single worm can be used for several purposes, such as identification to the species, subspecies, strain and antihelmenthic resistance. dna extraction from a single small worm using traditional methods such as phenol extraction technique faces serious prob lems. methods: dna from 20 single haemonc...
the identity and unity of the divine attributes in mulla sadra’s view is based on the possibility of extraction of multiple concepts from a single aspect of an instance. this possibility is not compatible with the unity of the concept with its referent and is not also compatible with the denotation of concepts. in this article, the unity of god’s essence and attributes is the main assumption be...
the chemical extraction of twenty-nine elements in a washing aggregate sludge, a clay-richsediment, a sewage sludge, the mixtures of these materials and the artificial lightweight aggregates (lwas)manufactured with them was determined by applying the optimized european community bureau of reference sequential extraction procedure in order to establish the effect of the thermal treatment on the ...
the history of plant’s used for mankind is as old as the start of humankind. initially, people used plants for their nutritional proposes but after the discovery of medicinal properties, this natural ?ora became a useful source of disease cure and health improvement across various human communities. berberis vulgaris is one of the medicinal plants used in iranian traditional medicine. berberis ...
objective: an immediate complete denture is fabricated before the extraction of all teeth. it has several advantages such as preservation of esthetics, muscular tone, normal speech and reduction of post-operative pain. this report describes a method of using patient’s current fixed partial denture (fpd) for single-appointment construction of interim immediate denture. case: we used patient’s ...
A simple and solvent-minimized sample preparation technique based on hollow fibre-protected liquid-phase micro-extraction has been developed for extraction of fifteen organic sulphur compounds from aqueous samples. The analysis of the extracted them was performed by gas chromatography equipped with mass spectrometry and/or flame photometric detectors. 3.3 µL of organic solvent located in the lu...
Background and Aims:Nowadays, many different techniques to extraction of chemical compounds from aquatic samples have been introduced, for examples techniques based on the use of needles that were packed with some sorbents. Considering that so far no synthesis sorbent based on single-walled carbon nanotubes and sol-gel techniques for the extraction of toluene and methyl ethyl ketone from ...
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